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what is the legal thc limit for driving

There is no nationwide THC driving limit in the US. A few states use a 5 ng/mL per se rule, others use zero tolerance. Here is how the numbers work.

how long after smoking can you drive

There is no single safe number of hours — wait until impairment is fully gone, usually several hours after smoking, and never drive while high.

How Common Is Cannabis Use Disorder?

About 7% of people in the US aged 12 or older had cannabis use disorder in the past year. NIDA estimates 3 in 10 cannabis users develop CUD.